{
  "manageEntity": {
    "action": "Update",
    "entityId": "21198878",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierarqa2c6ibh3nghbdmngkhbpz2vkfxg3r3ccjqoz6fypqwn45xt7gq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1383306404},{\"type\":\"playlist\",\"playlist_id\":1490231555},{\"type\":\"playlist\",\"playlist_id\":349471529},{\"type\":\"playlist\",\"playlist_id\":1459751981},{\"type\":\"playlist\",\"playlist_id\":1718275804},{\"type\":\"playlist\",\"playlist_id\":1814156473},{\"type\":\"playlist\",\"playlist_id\":20900596}]}}}",
    "nonce": "0x58c44a1f41d268d542db7844725f35fdf86ff53f9ccf53428c4e036a6ff5088a",
    "signature": "0xdf7a0f362a54e077d0ccf3bcf534a6df7e564b8bf169ba9c839ea7b925d1494e3c5e24ffc4325d4a891440568e5993b4ee845b71fff0ba910c5ec4a7ba04fb321c",
    "signer": "0x8b7556E7750Ee0c39Fa7aD97C314A99994C405Fa",
    "userId": "21198878"
  }
}